I can righten you can righten he can righten we can righten you can righten they can righten
V-ing form
I can be rightening you can be rightening he can be rightening we can be rightening you can be rightening they can be rightening
Perfect
I can have rightened you can have rightened he can have rightened we can have rightened you can have rightened they can have rightened
V-ing perfect
I can have been rightening you can have been rightening he can have been rightening we can have been rightening you can have been rightening they can have been rightening
Negation
Simple form
I can't righten you can't righten he can't righten we can't righten you can't righten they can't righten
V-ing form
I can't be rightening you can't be rightening he can't be rightening we can't be rightening you can't be rightening they can't be rightening
Perfect
I can't have rightened you can't have rightened he can't have rightened we can't have rightened you can't have rightened they can't have rightened
V-ing perfect
I can't have been rightening you can't have been rightening he can't have been rightening we can't have been rightening you can't have been rightening they can't have been rightening
Interrogative form
Simple form
can I righten? can you righten? can he righten? can we righten? can you righten? can they righten?
V-ing form
can I be rightening? can you be rightening? can he be rightening? can we be rightening? can you be rightening? can they be rightening?
Perfect
can I have rightened? can you have rightened? can he have rightened? can we have rightened? can you have rightened? can they have rightened?
V-ing perfect
can I have been rightening? can you have been rightening? can he have been rightening? can we have been rightening? can you have been rightening? can they have been rightening?
Interro-negative form
Simple form
can't I righten? can't you righten? can't he righten? can't we righten? can't you righten? can't they righten?
V-ing form
can't I be rightening? can't you be rightening? can't he be rightening? can't we be rightening? can't you be rightening? can't they be rightening?
Perfect
can't I have rightened? can't you have rightened? can't he have rightened? can't we have rightened? can't you have rightened? can't they have rightened?
V-ing perfect
can't I have been rightening? can't you have been rightening? can't he have been rightening? can't we have been rightening? can't you have been rightening? can't they have been rightening?